Quick and dirty creation guidelines:

Standard PC creation as per V20 rules. Consider the clans in the setting for strengths and weaknesses. Main Camarilla clans preferred. Independent clans are allowed, preference towards Ravnos and Giovanni (as the two clans have a history of working with the Camarilla in New York, and as such a better standing) Setites lack a support structure, and Assamites tend to not stay in the city that is a Tremere stronghold. No Anarch or Sabbat PCs, but you are of course free to have Anarch (or even Sabbat) leanings, but should you fully become one or the other sect, you will turn a NPC.

• Common sense rules. Does this PC have a reason to be in the setting, if so, what is it?

• Why is your PC good at something, or bad at something, or just average at something?

• Merits/Flaws, these need to be motivated. If a flaw is not a detriment to your PC it will not be accepted. Child flaw will not be accepted regardless.

Aside from that there is no banned/restricted Merits or Flaws, or anything else to consider but it is as always the Storytellers prerogative to decline anything they feel is not suited to the setting. Again, common sense. If you want you can always ask the STs beforehand about your idea.

You can argue for your case, but the less "out there" your PC is, the easier it will be to get sanctioned. No PC will be sanctioned without a background, obviously. This does not have to be a novel, just something that explains the character.